621064506 has 16 divisors (see below), whose sum is σ = 1246855104. Its totient is φ = 206233824.

The previous prime is 621064501. The next prime is 621064511. The reversal of 621064506 is 605460126.

It is an interprime number because it is at equal distance from previous prime (621064501) and next prime (621064511).

It is a super-2 number, since 2×621064506² = 771442241226048072, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (621064501) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 195211 + ... + 198366.

It is an arithmetic number, because the mean of its divisors is an integer number (77928444).

Almost surely, 2^621064506 is an apocalyptic number.

621064506 is an abundant number, since it is smaller than the sum of its proper divisors (625790598).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

621064506 is a wasteful number, since it uses less digits than its factorization.

621064506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 393845.

The product of its (nonzero) digits is 8640, while the sum is 30.

The square root of 621064506 is about 24921.1658234522. The cubic root of 621064506 is about 853.1896334292.

The spelling of 621064506 in words is "six hundred twenty-one million, sixty-four thousand, five hundred six".